...务器端（Google Earth Server）、客户端（Google Earth Enterprise Client，以下简称“GE EC”）、关联层（Google Earth Fusion）。它的架构示意如下：
基于12个网页-相关网页
物理介质关联层 Physical Media Dependent ; PMD
关联层次 relevance presenting levels
多层关联规则 multi-level association rule ; multi-level associated rules
单层关联规则 Single-level Association rule
与帧关联的高层协议 Service Access Point
阶层关联 Level to Level setting
关联子层 Physical Medium Dependent sublayer ; PMD
多层关联 multilevel association
约束性多层关联规则 multiple-level association rules with item constraints
这个层中的流程在 SOA 参考体系结构中没有关联层，不过，它们能帮助解释什么导致使用者流程启动。
The processes in this layer have no associated layer in the SOA reference architecture; however, they help explain what leads to the launch of a consumer process.
如果使用默认懒加载(lazy)配置的一对多关联，并在表示层中执行同一行代码，size变量的值为0。
If the same line of code executes in the presentation tier, the value of size variable is 0 if the default lazy fetching configuration for one-to-many associations is in use.
最后而且同样重要的，门户已经证实了当不需要展示与他们相关联的表示层的服务时，要与一方系统和流程整合起来是困难的。
Last but not least, portals have proven difficult to integrate with the party systems and processes as they do not necessarily expose services associated to their presentation layer.
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